<html>
<head>
    <title>登录</title>
    <style>
        div {
            width: 300px;
            height: 100px;
            position: absolute;
            top: 50%;
            left: 50%;
            margin-top: -50px;
            margin-left: -150px;
        }
    </style>
</head>
<body>
<h2>服务器：${localPort?c}</h2>
<h2>当前sessionId：${sessionId}</h2>
</body>
</html>